Help in Cattleya transplant.
 

I hate transplants from large plants. Last year I bought several plants from Akatsuka Orchid and they are ready to change containers. Because of my fear, I was leaving this aside, and now that I did, I found a pseudobulb completely down, I do not know what to do, I separated the substrate to see if it tends to rise and nothing. What could I do? I am very sad to post this, which has been because of my negligence but I have already learned the lesson. I would appreciate your advice. Greetings.

Container size looks fine to me - there is plenty of room for new growth. When it is spilling over the side or breaking the pot, THEN a larger pot is in order. You could just remove a bit of the surface bark to compensate for the plant being potted a little too deeply. The bark looks good, at least in the pictures. The best thing do to is... pretty much nothing at all.

The new growth went down about two inches and continues to penetrate into the substrate, I think it can rot if it keeps growing.

Since it is in a basket and can dry out (important not to over-water a Catt anyway) it should be OK. Letting it get nearly dry before watering again is important. The fact that it is in a basket will help - it will dry quickly. In the photo the new growth looks fine, it appears to be growing upward. Just remove the bark that is around it. If you get a growth that really wants to go sideways, you can also cut that coconut husk liner and let it go wherever it wants (although then the bark tends to fall out, but then, that's OK too... I think of a basket as a three-dimensional mount)

I separated the substrate from that growth after I transplanted the plant, which was in a plastic pot inside another grid to hang it, when I realized, the pseudobulb had left the pot and as the grid did not let it rise, he grew down. I am traumatized by transplants and it hurts to do them. Last week I had to break a basket with two plants that had more than three years in it, this was horrible, I spent four hours cutting coconut fibers to not damage the roots, they were two babies that I had planted very young and they were too large and with a decomposed substrate, which came out as fine soil below the basket. My attention was that there was no dry root, all were beautiful inside that, something I had not seen in the cattleyas that are bought adults and always have a bit of dead roots, I think maybe it's because I water once a the week the big baskets or maybe less. Contrary to seedlings, which water daily until they are close to the flowering.